METHOD FOR TRANSMITTING CLOCK SIGNAL, METHOD FOR SYNCHRONIZING CLOCK GENERATOR OR NETWORK ELEMENT AND NETWORK ELEMENT AND CLOCK GENERATOR

摘要

PROBLEM TO BE SOLVED: To provide a clock signal transmission method, a synchronization method between a clock generator and a network element, the network element and the clock generator. SOLUTION: In this method, clock quality is informed by phase modulating clock signals(CS). The clock signals(CS) are transmitted and received through a simple clock interface (T4. CLO; T3. CLI) and provided with phase modulation for indicating the feature of the clock quality. The phase modulation is detected and quality information is pulled out from there. Based on the quality information, the clock generator (SSU) or the network element (SEC) is synchronized with the clock signals. Also, the clock generator (SSU) and the network element (SEC; NE) are for executing these two methods.